Citation: Sharygin, V. V.; Pekov, I. V.; Zubkova, N. V.; Khomyakov, A. P.; Stoppa, F.; Pushcharovsky, D. Y. (2013). Umbrianite, K7Na2Ca2[Al3Si10O29]F2Cl2, a new mineral species from melilitolite of the Pian di Celle volcano, Umbria, Italy. European Journal of Mineralogy, 25, pp. 655-669.